dev.kafol.net

Windows 7 SSD Tips

noreply@blogger.com (jean caffou) — Wed, 18 Apr 2012 16:38:00 +0000

The list may be updated.

You probably already know this:
Install large programs on the HDD instead of the SSD drive.
Disabling hibernation saves you X GBs on the SSD drive, where X is the size of your RAM.
Run cmd as administrator.
Type in: powercfg -h off
Move Documents, Movies, Pictures, Music folder on the HDD drive.
Moving these directories is easy. Just right-click on them, click Properties, click Location and click Move.
Move AppData folder - this is the folder where your installed programs store temporary and/or your local data which is used by those programs. It can grow really large in size.
There is no simple procedure to do this, so this option is not really preferred.
Move the whole Users folder.
LifeHacker has an article about it. Again, not a really simple solution.

Windows 7 File permission problem after reinstallation

noreply@blogger.com (jean caffou) — Mon, 16 Apr 2012 22:08:00 +0000

Run command line as administrator

For Folders or Directories (will perform action recursively):

takeown /f directory_name /r /d y
icacls directory_name /grant administrators:F /t

Replace file_name or directory_name with actual file name or folder name, with path when applicable. The first command will take ownership of the file or folder specified, and the second command will grant full control permissions to administrators user group. Note that when using command for folders, to command will run recursively. To prevent the task been perform recursively, remove the “/r” and “/t” switch.

Source: http://forum.thewindowsclub.com/windows-tips-tutorials-articles/18379-how-take-ownership-full-control-permissions-files-folders-windows.html

Google Maps API Key for Android (Eclipse, Windows)

noreply@blogger.com (jean caffou) — Sat, 14 Apr 2012 14:59:00 +0000

There are two main types of keystores in Eclipse - one is for debugging (a keystore with no password) and the other one is when you create a new one yourself, with a password.

To make Google Maps work on your Android app, you need to enter a MD5 fingerprint of your keystore in Google Maps API signup: http://code.google.com/android/maps-api-signup.html

And here's how you get your keystore's MD5 fingerprint in Windows.

You probably already have JDK installed. Find out your Java bin directory. Mine is:
C:\Program Files\Java\jdk1.6.0_24\bin
Enter this directory path in your PATH Environment variable (see picture).
Start "cmd" and navigate to your
C:\Users\<yourusername>\.android
directory
Type this command:
keytool -list -keystore debug.keystore
The password is empty, just hit enter
You're done. Copy the MD5 fingerprint in that url, you get an API key, which you use in your Android MapView Layout file.
android:apiKey="your api key here"

Repcached does not compile

noreply@blogger.com (jean caffou) — Thu, 01 Mar 2012 23:45:00 +0000

If you want the tutorial on installing repcached, click here.

For the record, I am using:

Ubuntu 11.10

Linux 3.0.0-12-server #20-Ubuntu SMP Fri Oct 7 16:36:30 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)

GNU Make 3.81

If you're getting this error when doing make for repcached,

memcached.c: In function âadd_iovâ:
memcached.c:696:30: error: âIOV_MAXâ undeclared (first use in this function)
memcached.c:696:30: note: each undeclared identifier is reported only once for each function it appears in
memcached.c: In function âprocess_statâ:
memcached.c:1127:9: warning: format â%dâ expects argument of type âintâ, but argument 3 has type âlong unsigned intâ [-Wformat]
memcached.c:1134:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1138:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1139:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1140:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1141:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1142:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1143:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1144:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1145:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c:1146:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âsize_tâ [-Wformat]
memcached.c:1149:9: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c: In function âprocess_get_commandâ:
memcached.c:1331:19: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
memcached.c: In function âdo_add_deltaâ:
memcached.c:1573:5: warning: format â%lluâ expects argument of type âlong long unsigned intâ, but argument 3 has type âuint64_tâ [-Wformat]
make[2]: *** [memcached-memcached.o] Error 1
make[2]: Leaving directory `/root/memcached-1.2.8-repcached-2.2'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/memcached-1.2.8-repcached-2.2'
make: *** [all] Error 2

Related discussion here.

Compiler says that IOV_MAX is not defined. I'm not really sure what this is, but it compiled fine on Ubuntu 10.04. I guess that const is not used anymore.

In memcached.c code, we can see that IOV_MAX is defined if the OS is FreeBSD or iOS, so I decided to just define it anyway.

Here is my diff of the code that made it compile, in case you need it.

57,59c57

< #if defined(__FreeBSD__) || defined(__APPLE__)

< # define IOV_MAX 1024

< #endif

---

> #define IOV_MAX 1024

PHP :: Advice on using count()

noreply@blogger.com (jean caffou) — Tue, 28 Feb 2012 17:26:00 +0000

I may be a little late realising this, but a few dozen thousand lines of PHP code in, it's better late than never.

Let's look at example #1 on count() manual
http://php.net/manual/en/function.count.php

$result = count(null); // $result == 0
$result = count(false); // $result == 1

Does this strike you as a bit odd? Why the hell should count(0) or count(false) be equal to 1?

Well strangely enough, that's how it is. So for example, if you wrote a mysql_query() wrapper where you return false if the query fails and if you expect an array where you check the number of items, you find out that if the query fails, the count will return 1, and you might get some unexpected results.

Keeping computer security in mind, it's best to avoid count() when just checking if some data is returned.

Alternatives are empty() if checks if a variable contains something other than 0, '0', null, false, array() or ''.

OR, in your wrapper functions, if the query fails, just return NULL!

Apache :: Could not determine fully qualified domain name

noreply@blogger.com (jean caffou) — Tue, 28 Feb 2012 01:05:00 +0000

Error message:

apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

Is preety much self-explanatory

Add this
ServerName localhost

In your server configuration file.

Apache :: VirtualHost overlap on port

noreply@blogger.com (jean caffou) — Tue, 28 Feb 2012 00:57:00 +0000

Errors like

[warn] _default_ VirtualHost overlap on port 443, the first has precedence

are caused because the virtualhosts are not named.

(The same applies for any other port, for example 80)

Add this in your apache configuration file

NameVirtualHost *:443

In Ubuntu server, Linux, that configuration is actually located in the ports.conf file in /etc/apache2.

NameVirtualHost *:80
NameVirtualHost *:443

Listen 80

MySQL not starting when restoring files in /var/lib/mysql

noreply@blogger.com (jean caffou) — Sun, 26 Feb 2012 01:06:00 +0000

If you get errors like:

120226 1:54:14 [Note] Plugin 'FEDERATED' is disabled.
120226 1:54:14 InnoDB: Initializing buffer pool, size = 8.0M
120226 1:54:14 InnoDB: Completed initialization of buffer pool
120226 1:54:15 InnoDB: Started; log sequence number 0 44233
120226 1:54:15 [ERROR] Event Scheduler: Failed to open table mysql.event
120226 1:54:15 [ERROR] Event Scheduler: Error while loading from disk.
120226 1:54:15 [Note] Event Scheduler: Purging the queue. 0 events
120226 1:54:15 [ERROR] Aborting

120226 1:54:15 InnoDB: Starting shutdown...
120226 1:54:20 InnoDB: Shutdown completed; log sequence number 0 44233
120226 1:54:20 [Note] mysqld: Shutdown complete

120226 1:59:18 [Note] Plugin 'FEDERATED' is disabled.

mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)

120226 1:59:18 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

120226 1:59:18 InnoDB: Initializing buffer pool, size = 8.0M

120226 1:59:18 InnoDB: Completed initialization of buffer pool

120226 1:59:18 InnoDB: Started; log sequence number 0 44233

120226 1:59:18 [ERROR] mysqld: Can't find file: './mysql/host.frm' (errno: 13)

120226 1:59:18 [ERROR] Fatal error: Can't open and lock privilege tables: Can't find file: './mysql/host.frm' (errno: 13)

You need to check the file permissions.

The user and group is mysql:mysql

File permissions are rw for user and group (660)

Solution

chown mysql:mysql -R /var/lib/mysql

chmod 660 -R /var/lib/mysql

NETBIOS / Samba share does not accept username and password

noreply@blogger.com (jean caffou) — Wed, 22 Feb 2012 18:19:00 +0000

If your username and password gets rejected when logging in MS file share, try using the INT domain for login.

example:

username: INT\your_username
password: your_password

Linux/Ubuntu :: pure-ftpd does not allow login to user with /usr/sbin/nologin shell

noreply@blogger.com (jean caffou) — Tue, 21 Feb 2012 17:04:00 +0000

Expectations:
You have created a user with /usr/sbin/nologin shell (ftp-only user) in Linux/Ubuntu.
If you SSH to the box with this username and password it should not work.
If you FTP to the box with this username and password it should.

Symptoms:
Pure-ftpd does not permit login if the shell is set to /bin/false or /usr/sbin/nologin.
If you change the shell to /bin/bash it works.

Connected to localhost.
220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
220-You are user number 2 of 50 allowed.
220-Local time is now 17:53. Server port: 21.
220-This is a private system - No anonymous login
220-IPv6 connections are also welcome on this server.
220 You will be disconnected after 15 minutes of inactivity.
Name (localhost:root): ftponly
331 User ftponly OK. Password required
Password:
530 Login authentication failed
Login failed.
Remote system type is UNIX.
Using binary mode to transfer files.

Solution:

You need to add the nologin or false shell to the file /etc/shells.

root@box:/# cat /etc/shells

# /etc/shells: valid login shells

/bin/csh

/bin/sh

/usr/bin/es

/usr/bin/ksh

/bin/ksh

/usr/bin/rc

/usr/bin/tcsh

/bin/tcsh

/usr/bin/esh

/bin/dash

/bin/bash

/bin/rbash

/usr/bin/screen

/bin/false

/usr/sbin/nologin

PHP :: sending SMS via najdi.si FREE SMS

noreply@blogger.com (jean caffou) — Sat, 18 Feb 2012 22:46:00 +0000

You need to make an account on https://id.najdi.si before you can use the code.

All info and description is in the code comments.

Example usage:

$sms = new sms();
$sms->send('090666666','one does not simply send an SMS');

Enjoy!

<?php
/**
* Purpose: 
* Sending SMS via Najdi.si Free SMS
*
* Description: 
* Script logs in using your username and password for https://id.najdi.si and then it sends an SMS to a mobile phone number. 
* There is a 160 character limit per message and daily limit of 40 sent messages.
* The script tries to limit the number of requests to a page and tries to hold on to the session as long as possible. 
* The session cookie is stored in a /tmp/folder for later use, if the script restarts. 
* Once instantiated, object can be reused for sending a number of SMS messages. 
* If a new object is instantiated, it will prefer to use a stored session.
*
* @version Date: 1. february 2012
* @author Žan Kafol
* @access public
*/

class sms {
 
 public $username = 'your_username';
 public $pass = '...';
 
 public $cookie_jar = '/tmp/cookie.najdi.si';
 
 private $error = '';
 
 /*
 * Construct function
 * @param string $username
 * @param string $password
 */
 function __construct($u = null, $p = null) {
  if(!is_null($u)) {
   $this->username = $u;
  }
  
  if(!is_null($p)) {
   $this->pass = $p;
  }
 }
 
 /*
 * Sends SMS
 * @param string $number
 * @param string $message
 */
 public function send($number,$message) {
  $message = urlencode(substr(iconv('UTF-8', 'ASCII//TRANSLIT', $message), 0, 160));
  $number = ltrim(preg_replace('/[^\d]/','',$number),'0');
  
  @list($area,$num1,$num2) = explode(' ',preg_replace('/(\d{2})(\d{3})(\d{3})/','\1 \2 \3',$number));
  
  $url = "http://www.najdi.si/sms/smsController.jsp?sms_action=4&sms_so_ac_={$area}&sms_so_l_={$num1}%20{$num2}&myContacts=&sms_message_=$message";
  
  $response = $this->response($this->req($url));
  
  if($response === false) {
   $this->login();
   $response = $this->response($this->req($url));
  }
  
  return $response;
 }
 
 /*
 * Returns last error as stdclass
 */
 public function get_error() {
  return $this->error;
 }
 
 private function login() {
  $this->req('http://www.najdi.si/auth/login.jsp?lg=0&target_url=http%3A%2F%2Fwww.najdi.si%2Findex.jsp');
  
  return $this->req("https://id.najdi.si/j_spring_security_check", array(
   'j_username'     => $this->username,
   'j_password'     => $this->pass,
   '_spring_security_remember_me' => 'on'
  ));
 }
 
 private function response($r) {
  $r = json_decode($r);
  
  if($r->dialog == 3) {
   $this->error = false;
   return $r;
  }
  
  $this->error = $r;
  return false;
 }
 
 private function req($url, $post = false) {
  $ack = curl_init();
  
  curl_setopt($ack, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20041001 Firefox/0.10.1" );
  curl_setopt($ack, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ack, CURLOPT_FOLLOWLOCATION, true);
  curl_setopt($ack, CURLOPT_URL, $url);
  curl_setopt($ack, CURLOPT_COOKIEFILE, $this->cookie_jar); 
  curl_setopt($ack, CURLOPT_COOKIEJAR, $this->cookie_jar); 
  
  if($post) {
   curl_setopt($ack, CURLOPT_POST, true);
   curl_setopt($ack, CURLOPT_POSTFIELDS, http_build_query($post));
  }
  
  $dat = curl_exec($ack);
  curl_close($ack);
  
  return $dat;
 }
}
?>

Android :: wrong image / data in ListView rows

noreply@blogger.com (jean caffou) — Sat, 19 Nov 2011 20:29:00 +0000

Android's ListView reuses list items when they aren't need anymore. For this reason, you need to make sure all views that should change, will actually get changed. Your problem is that if you don't find a drawable for the current list item, you don't empty nor hide the ImageView. You should do thumb.setImageDrawable(null) in that case, or thumb.setVisibility(View.GONE).

- From stackoverflow

Example code:

 @Override
     public View getView(int pos, View v, ViewGroup parent) {
      TimetableViewHolder timetableHolder;
         if (v == null) {
             LayoutInflater vi = ((Activity)context).getLayoutInflater();
             v = vi.inflate(R.layout.timetable_item, parent, false);
             timetableHolder = new TimetableViewHolder();
             timetableHolder.rel = (TextView) v.findViewById(R.id.rel);
             timetableHolder.time = (TextView) v.findViewById(R.id.time);
             timetableHolder.icon = (ImageView) v.findViewById(R.id.icon);
             v.setTag(timetableHolder);
         } else {
          timetableHolder = (TimetableViewHolder) v.getTag(); 
         }

         TimetableItem item = items.get(pos);

         if(item != null) {
          timetableHolder.rel.setText(item.rel);
          timetableHolder.time.setText(item.time);
          if(item.url.equals("ERROR")) {
           timetableHolder.icon.setImageResource(android.R.drawable.ic_menu_close_clear_cancel);
          } else if(item.url.equals("PRESTOP")) {
           timetableHolder.icon.setImageResource(android.R.drawable.ic_menu_directions);
          } else { // THIS IS IMPORTANT
           timetableHolder.icon.setImageResource(android.R.drawable.ic_dialog_info);
          }
         }

         return v;
     }

Android search dialog doesn't appear

noreply@blogger.com (jean caffou) — Sat, 19 Nov 2011 14:15:00 +0000

Have a problem?
The search dialog doesn't show up?

I just thought you should know, I found this interesting comment on stackoverflow:

oh my god. this is f*ing stupid. i had to use android:label="@string/xyz" instead of android:label="lol" and no single word about this in the documentation. unbelievable

This is my manifest:

<activity android:name=".SearchableActivity" >
 <intent-filter >
  <action android:name="android.intent.action.SEARCH" />
 </intent-filter>

 <meta-data
  android:name="android.app.searchable"
  android:resource="@xml/searchable" />
</activity>
<activity
 android:label="Preferred stations"
 android:name="PreferredStation"
 android:theme="@android:style/Theme.NoTitleBar" >
 <meta-data
  android:name="android.app.default_searchable"
  android:value=".SearchableActivity" />
</activity>

And searchable

<?xml version="1.0" encoding="utf-8"?>
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/search_label"
    android:hint="@string/search_hint" >
</searchable>

Android :: google maps (MapView) hacks, tricks, workarounds

noreply@blogger.com (jean caffou) — Sat, 19 Nov 2011 02:02:00 +0000

MapView isn't very developer friendly now is it?

Here are some hacks I've had to work with:

1) When tapping on the overlay, the app crashes if you're trying to display the dialog.
Unable to add window -- token null is not for an application
Yes, this is due to context. Especially if you're trying to do this in a seperate thread or AsyncTask.
Turns out the context you need to pass to your dialog is mapView.getContext();
AlertDialog.Builder dialog = new AlertDialog.Builder(mapView.getContext());

2) Displaying only the overlays which are within map bounds
Oh yeah, several problems here. You've probably come across at least one of these:

Wrong map bounds in onCreate (0, 360000000),
Yeah, in onCreate those haven't been calculated yet. onStart doesn't help either. Try this:

Runnable waitForMapTimeTask = new Runnable() {

public void run() {

if(mapView.getLatitudeSpan()==0||mapView.getLongitudeSpan()== 360000000) {

mapView.postDelayed(this, 100);

} else {

redrawMarkers(); // draw here

}

};

mapView.postDelayed(waitForMapTimeTask, 100);

You create a new thread and wait until you get the right bounds. Recursively call it again.

Map bounds ???
Don't worry, it's simple.

public Rect getMapBounds() {

return new Rect(

mapView.getMapCenter().getLongitudeE6() - mapView.getLongitudeSpan()/2,

mapView.getMapCenter().getLatitudeE6() - mapView.getLatitudeSpan()/2,

mapView.getMapCenter().getLongitudeE6() + mapView.getLongitudeSpan()/2,

mapView.getMapCenter().getLatitudeE6() + mapView.getLatitudeSpan()/2

);

}

...

if(!s.drawn && rect.contains(point.getLongitudeE6(), point.getLatitudeE6())) {

Yeah, okay, but what about panning / zooming?
Well, there are no methods, like onPan or onZoom, but some people found their way around this problem. There is no perfect solution, you'll see.
Check these links out:

Zoom in on double tap?
Click here: http://dev.kafol.net/2011/11/how-hard-is-it-to-make-simple-zoom-in.html.
Overlays don't get drawn immediately!
Try this:
mapView.postInvalidate();
or this:
mapView.invalidate();

But keep in mind, that invalidate() needs to be called from an UI! If you're trying to get it working from a thread, use postInvalidate()!
MapView java.util.ConcurrentModificationException when adding new overlays
~~Not sure if I solved this one, but it seems to work now. I read somewhere that this could happen if you add overlays in a non UI thread. I moved the~~
Nope, sorry, this one was my bad. I was doing some crazy async sorting and all hell broke loose.

itemizedOverlay.populateNow();

mapOverlays.add(itemizedOverlay);

mapView.postInvalidate();

From doInBackground to onPostExecute in AsyncTask.

You could also run something in a UI thread like this:

runOnUiThread(new Runnable() {
@Override
public void run() {
//do stuff here
}
});

Android :: google maps on double tap zoom in

noreply@blogger.com (jean caffou) — Fri, 18 Nov 2011 02:44:00 +0000

How hard is it to make a simple zoom in call on double tap in MapView in Android?

Not very.

How hard is it to get the information on how to do it?

Very.

Here's what you probably didn't know:
You need to extend the MapView and use this extended class in the Android XML layout file.
In the extended class you instantiate the gesture detector and set on double tap listener.
In the Map Activity you implement OnGestureListener and OnDoubleTapListener.

Example:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center_horizontal" >
    
 <net.kafol.vlaki.ExtMapView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/mapview"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:clickable="true"
     android:enabled="true"
     android:apiKey=""
 />

</RelativeLayout>

package net.kafol.vlaki;

import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.GestureDetector.OnDoubleTapListener;
import android.view.MotionEvent;
import android.view.GestureDetector.OnGestureListener;
import com.google.android.maps.MapView;

public class ExtMapView extends MapView {
 private Context context;
 private GestureDetector gestureDetector;

 public ExtMapView(Context c, AttributeSet attrs) {
  super(c, attrs);
  context = c;

  gestureDetector = new GestureDetector((OnGestureListener) context);
  gestureDetector.setOnDoubleTapListener((OnDoubleTapListener) context);
 }

 public boolean onTouchEvent(MotionEvent ev) {
  if (this.gestureDetector.onTouchEvent(ev))
   return true;
  else
   return super.onTouchEvent(ev);
 }
}

public class Map extends MapActivity implements OnGestureListener, OnDoubleTapListener {
...
 @Override
 public boolean onDoubleTap(MotionEvent e) {
     int x = (int)e.getX(), y = (int)e.getY();;
     Projection p = mapView.getProjection();
     mapView.getController().animateTo(p.fromPixels(x, y)); // zoom in to a point you tapped 
     mapView.getController().zoomIn();
  return true;
 }

Android : Checkbox ListView - (un) check all

noreply@blogger.com (jean caffou) — Fri, 18 Nov 2011 01:29:00 +0000

This recycling of views in android is preety insane. Pain to work with.

So the problem is how to check all check boxes in a list view, if a list view only contains the visible items.

Iterating through the adapter or array of holders was pretty unreliable, some checkboxes weren't affected.

What I did was actually add an attribute to the data object and iterate through this object array (the same way it get's added in the adapter)-

Here are some functions:

 public void toggleCheck(Boolean val) {
  
  for(Station s : stations.list) {
   s.checked = val;
   editor.putBoolean("PF_"+s.getID(), val);
  }
  
  for(int i=0 ; i < lv.getChildCount() ; i++) {
   CheckBox cb = (CheckBox) lv.getChildAt(i).findViewById(R.id.cb);
   cb.setChecked(val);
  }

  editor.apply();
 }
 
    private class StationCBViewHolder {
        public CheckBox cb;
        public Station s;
    }
 
 private class StationListAdapter extends ArrayAdapter {
     private ArrayList items;
     private Context context;
     
     public StationListAdapter(Context context, int tvResId, ArrayList items) {
         super(context, tvResId, items);
         this.items = items;
         this.context = context;
     }

     @Override
     public View getView(int pos, View v, ViewGroup parent) {
      final StationCBViewHolder holder;
      final Station item = items.get(pos);
      
         if (v == null) {
             LayoutInflater vi = ((Activity)context).getLayoutInflater();
             v = vi.inflate(R.layout.stationcheckboxitem, parent, false);
             
             holder = new StationCBViewHolder();
             holder.cb = (CheckBox) v.findViewById(R.id.cb);
             holder.s = item;
             
             item.checked = prefs.getBoolean("PF_"+item.getID(),true);
             
             //holder.cb.setTag(holder);
             holder.cb.setTag(item);
             holder.cb.setChecked(item.checked);
             holder.cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
     @Override
     public void onCheckedChanged(CompoundButton v, boolean isChecked) {
      Station s = (Station) v.getTag();
      editor.putBoolean("PF_"+s.getID(), isChecked);
      editor.apply();
     }
    });
                        
             v.setTag(holder);
         } else {
          holder = (StationCBViewHolder) v.getTag(); 
         }

         holder.cb.setText(item.toString());
         holder.cb.setChecked(item.checked);

         return v;
     }

 }

Full code here: http://pastebin.com/8NMbHqRV

The code still has some bugs related to SharedPreferences and SharedPreferences.Editor, but at least it checks and unchecks all checkboxes.

URL shortening - make your own URL shortener

noreply@blogger.com (jean caffou) — Wed, 14 Sep 2011 21:26:00 +0000

If you ever thought about URL shortening, you've probably already figured out, how it works.

Those random letters and numbers which serve as a key (in hashtable data structures) are basically encoded integers, which are AUTO_INCREMENT values in the database.

Here are the encoding and decoding functions:

const ALLOWED_CHARS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

function id2short($integer, $base = self::ALLOWED_CHARS) {
	$out = '';
	$length = strlen($base);
	while($integer > $length-1) {
		$out = $base[fmod($integer, $length)].$out;
		$integer = floor( $integer / $length);
	}
	return $base[$integer].$out;
}

function short2id($string, $base = self::ALLOWED_CHARS) {
	$length = strlen($base);
	$size = strlen($string)-1;
	$string = str_split($string);
	$out = strpos($base, array_pop($string));
	foreach($string as $i=>$char) {
		$out += strpos($base, $char) * pow($length, $size - $i);
	}
	return $out;
}

Full code here.

MySQL error 1236: Client requested master to start replication from impossible position

noreply@blogger.com (jean caffou) — Sat, 03 Sep 2011 00:01:00 +0000

Symptoms:
[1236] Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position'

110902 16:47:08 [ERROR] Error reading packet from server: Client requested master to start replication from impossible position ( server_errno=1236)
110902 16:47:08 [ERROR] Slave I/O: Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position', Error_code: 1236
110902 16:47:08 [Note] Slave I/O thread exiting, read up to log 'mysql-bin.000033', position 4621679

on the master
root@dimko:/var/lib/mysql# ls -la mysql-bin.000033
-rw-rw---- 1 mysql mysql 4620018 2011-09-01 13:45 mysql-bin.000033

4620018 is less than 4621679, therefore it's an invalid position.

Causes:
Master server has crashed and the binlog cache has not been flushed to disk. Slave has recieved a new position, did not recieve data, and data gets lost in a crash (however it might have been written to table, but not in binlog).

Solution:
Use this CHANGE MASTER statement on the slave.
CHANGE MASTER TO MASTER_LOG_FILE=[NEXT FILE], MASTER_LOG_POS=4;
SLAVE START;

in my case that would be

CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000034', MASTER_LOG_POS=4;
SLAVE START;

I don't know why the master log position needs to be 4 for the new file.

What happens:
When the master server restarts it logs binary changes to a new binlog file, so that we minimize data loss by skipping to the next file (everything from the previous file was written already).

Prevention:
Add this line to my.cnf:

sync_binlog = 1

With this setting the master server flushes cache in the binlog after every write, so that in case of a crash you can lose one statement at most.

Facebook php-sdk 3.0 changes getLoginURL()

noreply@blogger.com (jean caffou) — Wed, 27 Jul 2011 22:39:00 +0000

Somehow these frequent changes are still poorly documented. Documentation is scattered across forums, changelogs, code comments and docs pages. Never on the single place. This is horrible. I'm sorry Facebook people, but this makes you look incompetent.

The most obvious change is the abandonment of the getSession method. I have also found out that getLoginURL has been changed.
'req_perms' has been changed to 'scope'
'next' has been changed to 'redirect_uri'
'cancel_url' option has been removed. You'll have to find another way. If the user denies access it will be redirected to 'redirect_uri'. The user will also be redirected to 'redirect_uri' if he clicks allow.
You can know if the user denied access by looking at these GET parameters:

[error_reason] => user_denied 
[error] => access_denied 
[error_description] => The user denied your request.

Also worth knowing is that redirect_uri will not work every time on a single page load (without refreshing the page).
Explanation:
The first time the users sees the oauth dialog there will be two options: Allow and Deny. Both buttons will redirect to 'redirect_uri'.
The second time the user sees the oauth dialog, Deny option will be renamed to 'Leave app'. 'redirect_uri' will still work.
The third time and so on, the button 'Leave app' will redirect to facebook.com/home.php

While this may not be entirely precise, it is true that eventually the Deny/Leave app button will not follow the redirect_uri parameter.

SiOL TV, dve mrežni kartici, VLC player, Windows 7 x64-bit

noreply@blogger.com (jean caffou) — Sun, 24 Jul 2011 21:57:00 +0000

V primeru da vam IPTv ne deluje, če imate dve mrežni kartici (eno za internet in drugo za TV), poskusite pri mrežnem adapterju za TV nastaviti metriko na 2.

Ne pozabite na ostale nastavitve za vzpostavitev TV na VLC playerju:
-odprite VLC in pritisnite CTRL+P (Preferences)
-spodaj levo obkljukate Show settings "All"-s tem se omogočijo napredne nastavitve
-v meniju gremo na Input/Codecs - na desni pri UDP portu vnesemo pravi port, ki je za t2 "5000", pri MTU pa imam "1492", potem pa še obkljukamo "Force IPv4"
-gremo v meni "Video" in nato kliknemo "output modules" - pri "Video output modules" izberemo možnost iz seznama "OpenGL video output"
-nato v levem meniju izberemo meni "Stream output" in nato "Access output"
-V Access output sem v okence kjer piše "Multicast output interface" vpisal IP mrežne kartice, ki jo uporabljam za internet, v okence "IPv4 multicast output interface adress" pa sem vpisal IP mrežne kartice, ki jo uporabljam zgolj za IPTV
-zadevo shranite in ponovno zaženite program.

M3U file editor

noreply@blogger.com (jean caffou) — Sun, 24 Jul 2011 10:56:00 +0000

M3U are playlist files. I have developed this simple editor for a friend, that needed to edit IPTv playlist files.

The editor includes mass (bulk) edits as well as item editor. You can upload and export the same filetype.

You can check out the editor here:
http://kafol.net/code/m3u-edit/

M3U files are easy to parse:

<?
class m3u {
 public $data = array();
 public $name = '';
 
 public function __construct($data = null) {
  if(!is_null($data)) {
   $this->load($data);
  }
 }
 
 public function load($data) {
  if(!is_array($data)) explode("\n",$data);
  
  foreach($data as $i=>$line) {
   if(preg_match('/^#EXTNAME:(.+)/is',$line,$m)) {
    $this->name = clean($m[1]);
   }
   if(preg_match('/^#EXTINF:(\d+),(.+)/is',$line,$m)) {
    $item = new m3uitem();
    $item->length = intval($m[1]);
    $item->setName($m[2]);
    if(preg_match('/^#EXTTV:(.+)/is',$data[$i+1],$m)) {
     $item->setCategories($m[1]);
    }
    $item->file = trim($data[$i+2]);
    $this->data[] = $item;
   }
  }
 }
 
 public function sort() {
  usort($this->data, array(__CLASS__,'cmp'));
 }
 
 public static function cmp($a,$b) {
  if($a->sort == $b->sort) {
   return 0;
  }
  return ($a->sort > $b->sort) ? +1 : -1;
 }
 
 public function export() {
  $r = "#EXTM3U\n#EXTNAME:{$this->name}\n\n";
  foreach($this->data as $d) {
   $r .= "#EXTINF:{$d->length},{$d->getName()}\n";
   if($d->getCategories() != '') {
    $r .= "#EXTTV:{$d->getCategories()}\n";
   }
   $r .= "{$d->file}\n\n";
  }
  return $r;
 }
 
}

class m3uitem {
 public $sort = 0;
 public $length = 0;
 public $file = '';
 private $name = '';
 private $categories = array();
 
 public function __construct() {}
 
 public function getName() { 
  return $this->name; 
 }
 
 public function setName($name) {
  $this->name = clean($name);
 }
 
 public function getCategories() {
  return implode(';',$this->categories);
 }
 
 public function setCategories($data) {
  $this->categories = is_array($data) ? $data : explode(';',clean($data));
  
  foreach($this->categories as $i=>$cat) {
   if(empty($cat)) {
    unset($this->categories[$i]);
   } else {
    $this->categories[$i] = clean($this->categories[$i]);
   }
  }
 }
}
?>

Automatically download subtitles in VLC player

noreply@blogger.com (jean caffou) — Tue, 19 Jul 2011 12:14:00 +0000

You can write VideoLAN VLC player's extensions in LUA programming language. Extensions are in Videolan\VLC directory lua\extensions.

This is a modified extension to automatically download subtitles.

Download extension

Will add more languages upon request.
Currently this extension is intended for personal use.

Screenshots:

PHP goo.gl url shortener

noreply@blogger.com (jean caffou) — Tue, 19 Jul 2011 12:11:00 +0000

Here's an implementation of Google's url shortener: goo.gl.

<?
class googl {
 const api = 'https://www.googleapis.com/urlshortener/v1/url';
 private $key = null;
 
 public function __construct($key = null) {
  if(defined('GOOGLE_API_KEY')) {
   $this->setKey(GOOGLE_API_KEY);
  }
  
  if(!is_null($key)) {
   $this->setKey($key);
  }
 }
 
 public function setKey($key) {
  $this->key = $key;
 }
 
 public function s($url) {
  $data = $this->shorten($url);
  return isset($data->id) ? $data->id : $url;
 }
 
 public function shorten($url) {
  $key = '';
  $data = array();
  $data['longUrl'] = $url;
  
  if(!is_null($this->key)) {
   $key = '?key='.$this->key;
  }
  
  return $this->fetch(self::api.$key,$data);
 }
 
 public function expand($url) {
  $key = is_null($this->key) ? '' : "&key={$this->key}";
  return $this->fetch(self::api.'?shortUrl='.urlencode($url)."$key&projection=FULL");
 }
 
 private function fetch($url, $data = array()) {
  $ch = curl_init();
  
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/json'));
  
  if(!empty($data)) {
   curl_setopt($ch, CURLOPT_POST, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
  }
  
  $r = curl_exec($ch);
  curl_close($ch);
  
  return json_decode($r);
 }
}
?>

Disable Ubuntu Unity Launcher

noreply@blogger.com (jean caffou) — Wed, 25 May 2011 16:20:00 +0000

I guess I'm the only one that hates launchers in desktop environment systems. They're too dumbed down and I can't tell which apps are running and which are just shortcuts.

The easiest way to disable the Unity Netbook Launcher in Ubuntu is to log out from the session, click on the user name and before you enter the password, click on the bottom on the screen and switch to Ubuntu classic

Custom page numbering in MS Word

noreply@blogger.com (jean caffou) — Wed, 27 Apr 2011 10:54:00 +0000

I'm sure most of you came across this problem before - how to add custom page numbering.

I don't really like making seperate documents for the pages I don't want numbered and options in MS Word are preety limited. You can set up the numbering to start with a different number. You can't, however, set it up to start with a negative number.

Example: You have the first three pages you don't want numbered (front page, page index, thanks). Everything after those pages is numbered and starts with 1.

- Go to the header/footer - wherever you want to set up page numbering.
- Add page numbering, set it up to start with zero and check the option to have a different header/footer on the first page. This way the front page will have the page number zero, but you can delete numbering for that page.
- Now you need to "extend" the first page, so that the second (or third) page will also be unnumbered. You can do this with page breaks, go to Insert -> page break. There are a couple of different page breaks, choose the one that fits your needs.

There's an other way to do a completely custom page numbering, but it involves a tiny amount of "programming" and it won't work the same if you add page index, but here goes:

- Go to the header/footer
- Retype this code for the example above:

{ IF { PAGE } < 4 "" "{ = { PAGE } - 3 }" }

The important thing here is that you need to press CTRL+F9 to get the curly braces. If you retype them, it won't work.
- After you've written the conditions for page numbering, right-click on it and choose "Update field".

{ IF { PAGE } < 4 "" "{ = { PAGE } - 3 }" }

This is a simple conditional statement, if the current page number is less than four, the first argument (The empty "" string) will be used, otherwise it will calculate the current page number minus three.

Here are some other examples:

{ IF { PAGE } < 3 "" "{ = { PAGE } - 2 }" }

Skip the first two pages

{ IF { PAGE } < 3 "{ PAGE }" "{ = { PAGE } + 5 }" }

Number the first two pages normally, then add 5 to the current page number.

{ IF { PAGE } < 3 "{ PAGE }" "" }

Add a page number only to the first two pages.

Source